锂离子电池包热管理仿真建模与试验验证

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中图分类号：TM912； U463.63⋅3 文献标志码：A DOI： 10.20104/j.cnki.1674-6546.20250174

【Abstract】To enhance the safetyand effciencyof the power batteries fornewenergy vehicles，this study adopts a multi-scalecoupled approach encompassing“cell-module-pack”levels toestablish ahigh-fidelitythermal management simulation model for lithium-ion bateries.Through charge/discharge experiments conducted within the 15～45∘C temperature rangeand across various StateOf Charge （SOC），cellcharacteristic parametersareacquired，enablingtheconstructionand validationofsecond-orderRCquivalentcircuitmodel.Concuently，athr-dimensionalthermalmodelof thebatterypack is developedusing theNXand STAR-CCM+ softwareplatforms.This model is subsequentlycalibratedandvalidated with experimentaldataobtainedfromthermal-humiditytesting undercontroledhighandlowtemperatures.Theresultsrevealthat the simulation errors for battery pack temperature and cooling line pressure are both under 3% .This confirms that the model canaccuratelymap thethermal behaviorfromthemicro-scalepropertiesof thecelstothemacro-scaledynamicsof the battery pack.

Keywords：Lithium-ionbattery，Thermal management，Simulationmodel

1前言

锂离子电池凭借其较高的能量密度和较长的循环寿命，成为电动汽车和储能系统等领域的核心能源载体[1-3]。（剩余6317字）